The Collaborative International Dictionary of English v.0.48:

Gillie \Gil"lie\ Gilly \Gil"ly\, n. [Gael. gille, giolla, boy,
   lad.]
   A boy or young man; a manservant; a young male attendant, in
   the Scottish Highlands. --Sir W. Scott. [WordNet sense 1]
   [1913 Webster]

   2. a lowcut shoe without a tongue and decorative lacing.

   Syn: ghillie.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

gillie
    n 1: a young male attendant on a Scottish Highlander chief
    2: a shoe without a tongue and with decorative lacing up the
       instep [syn: ghillie, gillie]